patch 8.2.0953: spell checking doesn't work for CamelCased words

Problem:    Spell checking doesn't work for CamelCased words.
Solution:   Add the "camel" value in the new option 'spelloptions'.
            (closes #1235)
diff --git a/src/testdir/test_spell.vim b/src/testdir/test_spell.vim
index aee51c7..fbd5c1a 100644
--- a/src/testdir/test_spell.vim
+++ b/src/testdir/test_spell.vim
@@ -77,6 +77,11 @@
   call assert_equal(['bycycle', 'bad'],  spellbadword('My bycycle.'))
   call assert_equal(['another', 'caps'], 'A sentence. another sentence'->spellbadword())
 
+  call assert_equal(['TheCamelWord', 'bad'], 'TheCamelWord asdf'->spellbadword())
+  set spelloptions=camel
+  call assert_equal(['asdf', 'bad'], 'TheCamelWord asdf'->spellbadword())
+  set spelloptions=
+
   set spelllang=en
   call assert_equal(['', ''],            spellbadword('centre'))
   call assert_equal(['', ''],            spellbadword('center'))